Estimate daily water intake targets based on body weight, activity, and climate assumptions.
Quick planning, rough comparisons, and checking whether your assumptions are in the right range before you rely on final quotes or advice.
Review the assumptions below, then compare with related calculators if your decision depends on rates, eligibility, or provider-specific rules.
How this calculator works
- Baseline water is estimated at roughly 35 ml per kilogram of body weight.
- Exercise and hotter conditions add extra fluid needs.
- The result is a general hydration target, not a medical fluid plan.
Worked example
A 70 kg person with light activity often lands near the 2.5 to 3.0 liter range.
Important assumptions
- Heavy sweating, illness, or special diets can change hydration needs.
- Food and other beverages also contribute to total fluid intake.
- Medical advice should override general intake rules.
FAQ
Are these calculators free?
Yes. lankacalculator tools are free to use and designed to be quick to access without sign-up.
How accurate are the results?
The calculators use clear assumptions and formulas, but results are estimates and should be checked against official documents or provider terms.
Can I use this on mobile?
Yes. The layout is built to work cleanly on phones, tablets, and desktops.
Do you store my inputs?
No account is required for these tools, and calculator inputs are not stored as user profiles in this v1 setup.